Array substrate, color filter substrate, touch control display device and methods for driving the same

ABSTRACT

The disclosure provides an array substrate and a color filter substrate of a capacitive touch control screen, a touch control display device and a method for driving the touch control display device, so as to achieve the self-capacitive multi-point touch. The array substrate of the capacitive touch control screen includes: a peripheral area and a display area; a plurality of pixel units with pixel electrodes arranged in the display area; a plurality of touch control electrodes; and touch control electrode lead wires connected with a module configured to detect a touch control signal, wherein each of the touch control electrodes is connected respectively with one of the touch control electrode lead wires.

CROSS-REFERENCES TO RELATED APPLICATIONS

This application a continuation of U.S. patent application Ser. No.15/296,039, filed on Oct. 18, 2016, which is a continuation of U.S.patent application Ser. No. 14/281,897 filed on May 20, 2014, whichapplication claims priority to Chinese Patent Application No.201310754202.0, entitled “ARRAY SUBSTRATE, COLOR FILTER SUBSTRATE, TOUCHCONTROL DISPLAY DEVICE AND METHODS FOR DRIVING THE SAME”, filed with theState Intellectual Property Office of People's Republic of China on Dec.31, 2013, the content of which is incorporated herein by reference inits entirety for all purposes.

BACKGROUND

In the prior art, capacitive touch control technologies can fall intoself-capacitive and mutual-capacitive technologies as per capacitancedetection schemes and into in-cell, on-cell and out-cell technologies asper the relative relationship between a Thin Film Transistor (TFT) and aColor Filter (CF) substrate, where the in-cell technology has become asignificant development direction of the touch control technologies dueto its high integration, thinness, superior performances and otheradvantages. Various conventional systems and methods exist, butunfortunately inadequate. New and improved systems and methods ofcapacitive touch control are desired.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of a mutual-capacitive designon the color filter substrate side in the prior art;

FIG. 2 is a schematic diagram of an out-cell self-capacitive design inthe prior art;

FIG. 3 is a schematic diagram of ghost points appearing as a result of aself-capacitive two-point touch in the prior art;

FIG. 4 is a schematic structural diagram of touch control electrodes andtouch control electrode lead wires in an array substrate of a capacitivetouch control screen according to an embodiment of the invention;

FIG. 5 is an enlarged schematic diagram between two adjacent touchcontrol electrodes in an array substrate of a capacitive touch controlscreen according to an embodiment of the invention;

FIG. 6 is a schematic diagram of a common electrode and a metal layerelectrically connected with the common electrode in an array substrateof a capacitive touch control screen according to an embodiment of theinvention;

FIG. 7 is a schematic connection diagram of touch control electrode leadwires in an array substrate of a capacitive touch control screenaccording to an embodiment of the invention;

FIG. 8 is another schematic connection diagram of touch controlelectrode lead wires in an array substrate of a capacitive touch controlscreen according to an embodiment of the invention;

FIG. 9(a) is a schematic structural diagram of touch control electrodesand touch control electrode lead wires in a color filter substrate of acapacitive touch control screen according to an embodiment of theinvention;

FIG. 9(b) is a local enlarged diagram of the touch control electrode atthe area A in FIG. 9(a);

FIG. 10 is a schematic connection diagram of touch control electrodelead wires in a color filter substrate of a capacitive touch controlscreen according to an embodiment of the invention;

FIG. 11 is another schematic connection diagram of touch controlelectrode lead wires in a color filter substrate of a capacitive touchcontrol screen according to an embodiment of the invention;

FIG. 12 is a schematic diagram of a channel of a color filter substrateconductive electrode in a color filter substrate of a capacitive touchcontrol screen according to an embodiment of the invention;

FIG. 13 is a schematic diagram of a square wave signal inputted to atouch control display device in a touch control phase according to anembodiment of the invention; and

FIG. 14 is an enlarged schematic diagram of a square wave signalinputted to a touch control display device in a touch control phaseaccording to an embodiment of the invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Embodiments of the invention provide an array substrate and a colorfilter substrate of a capacitive touch control screen, a touch controldisplay device and a method for driving the touch control displaydevice, so as to achieve the self-capacitive multi-point touch. Thereare other embodiments well.

As mentioned above, existing conventional systems and methods areinadequate. Certain conventional systems and inadequacies thereof aredescribed in more detail below. The CF side in-cell mutual-capacitivetechnology in the prior art is illustrated in FIG. 1, where a CFsubstrate and an array substrate are arranged in opposite. The arraysubstrate includes a glass substrate 21, a thin film transistor elementlayer 17 arranged on the glass substrate 21, and a polarization sheet 20on the outside of the glass substrate 21. The CF substrate includes aglass substrate 11, a Black Matrix (BM) 12 arranged on the glasssubstrate 11, and a first metal layer 13 and a second metal layer 15below the BM, where there is a color filter layer 14 between the firstmetal layer 13 and the second metal layer 15, and the first metal layer13 and second metal layer 15 added on the CF substrate side function asmutual-capacitive touch control traveling lines. In order to lowerinterference to display signals, touch control and display operationsneed to be performed separately, and it is necessary to spare asufficiently long period of time to perform the touch control operationfor a display Integrated Circuit (IC). A time period required for atouch control operation in the general mutual-capacitive scheme isproportional to the number of scanned channels so that the larger ascreen is, the larger the number of channels will be, the longer theperiod of time required for the touch control operation will be, and theshorter A time period spared for a display scan operation will be, butthe period of time for the display scan operation can only be shortenfinitely, and consequently the screen size which can be supported in theexisting mutual-capacitive scheme is limited greatly.

General self-capacitive designs in the prior art are mostly used forout-cell structures, and as illustrated in FIG. 2, there is a triangularpattern design embodied by using a structurally simple and highlysensitive single-layer pattern but incapable of a multi-point touchcontrol operation, for example, when there is a two-point touch, onlyabscissas and ordinates of two points can be given concurrently withoutdifferentiating the ordinates corresponding to the respective abscissas.That is, ghost points (i.e., black points shown in FIG. 3) appear whentwo points are touched concurrently in the self-capacitive design in theprior art, as illustrated in FIG. 3. The multi-point touch cannot beidentified directly in the self-capacitive design in the prior art, andalgorithms have to be used to approach the effect of the multi-pointtouch. When the self-capacitive design is directly applied to thein-cell scheme, an overly large area of a capacitor results in an overlyhigh parasitic capacitance, to thereby form a background value of aninductive capacitance, which is difficult to be achieved.

In summary, the multi-point touch cannot be achieved in theself-capacitive design in the prior art.

Embodiments of the invention are described below in detail.

As illustrated in FIG. 4, which is a schematic structural diagram oftouch control electrodes and touch control electrode lead wires in anarray substrate of a capacitive touch control screen according to anembodiment of the invention, the array substrate includes a peripheralarea 42 and a display area 43. A plurality of pixel units with pixelelectrodes are positioned within the display area 43. The arraysubstrate also includes a plurality of touch control electrodes 40 andtouch control electrode lead wires 41 connected with a module configuredto detect a touch control signal, where each touch control electrode 40correspond to one or more of pixel units. Each touch control electrode40 is connected respectively with one touch control electrode lead wire41. The array substrate further includes a common electrode arrangedabove the pixel electrodes, where the common electrode acts as the touchcontrol electrodes 40. In a particular embodiment of the invention, thecommon electrode comprises a transparent conductive layer, which ispreferably made of the Indium Tin Oxide (ITO) material.

Specifically for a liquid crystal display in the Fringe Field Switching(FFS) mode, a gate layer, a semiconductor active layer, a source layer,a drain layer, an insulation passivation layer, pixel electrodes and acommon electrode are fabricated in that order on a substrate, where therespective layers of the FFS liquid crystal display can be fabricated inthe existing processes, so the repeated description thereof will beomitted here. In this embodiment, the common electrode is positionedabove the pixel electrodes and made of the transparent ITO material, andin a particular embodiment of the invention, the pixel electrodes maycomprise of the transparent ITO material. As illustrated in FIG. 5, thecommon electrode is separated out in the display area 43 and dividedinto separate zones, each of which is one touch control electrode 40configured to detect a signal separately. All the touch controlelectrodes 40 are led out through a plurality of touch control electrodelead wires 41 and finally connected onto an Integrated Circuit (IC) or aFlexible Printed Circuit (FPC) for detection. The common electrode layerfabricated in this process is at the top. Since the common electrodefurther provides a common voltage to each pixel unit, the commonelectrode is broken between adjacent pixel units 50 and 52 in thedisplay area 43, such as a gap 51 as illustrated, to thereby avoidinfluencing the normal picture display due to reusing of the commonelectrode as the touch control electrodes.

For an FFS design in another film layer architecture, a common electrodecan be similarly selected as touch control electrodes, for example, inorder to improve the optical performance, an organic film layer can beadded on the TFT side, and in a typical process sequence, a gate layer,a semiconductor active layer, a source layer, a drain layer, a siliconnitride SiN_(x) insulation layer, an organic film layer, a commonelectrode layer, a silicon nitride SiN_(x) insulation layer and a pixelelectrode layer are fabricated in that order on a substrate. Similarly,the respective layers of the FFS design can be fabricated using existingprocesses, so the repeated description thereof will be omitted here. Atthis time, the common electrode is arranged below pixel electrodes, andthe common electrode can be designed as shown in FIG. 5, where thecommon electrode is segmented into separate patterns for both displayand touch control functions concurrently. The arrangement of the commonelectrode below the pixel electrodes in this embodiment can lower theload capacitance of the common electrode layer and facilitate animprovement in touch control performances as compared with thearrangement of the common electrode above the pixel electrodes in theembodiments of FIG. 4 and FIG. 5. It is to be appreciated that a loadcapacitance of the common mode electrode layer can lead to improvedperformance.

According to a particular embodiment of the invention, the arraysubstrate of the capacitive touch control screen further includes afirst metal layer 60 electrically connected with a common electrode 61and arranged in a non-display area between pixel units 63, asillustrated in FIG. 6. Since the common electrode in the particularembodiment of the invention is made of ITO with a higher squareresistance, a metal layer can be added on the ITO layer to lower theresistance of the common electrode layer. Since the first metal layer 60is opaque, the first metal layer 60 only cover the non-display areabetween the pixel units 63. That is, the first metal layer 60 isarranged in a light shielding area of a black matrix of a color filtersubstrate, so that even though the first metal layer 60 is opaque, itwill not result in reducing the aperture ratio of the display device. Asillustrated in FIG. 6, the common electrode 61 includes a plurality ofbranch electrodes. The common electrode forms a plurality of slits 62 inthe pixel unit area, and a horizontal electric field is formed betweenthe branch electrodes of the common electrode 61 and the pixelelectrodes and used to control rotations of liquid crystal molecules tothereby achieve the purpose of displaying a picture. In a particularembodiment of the invention, the first metal layer electricallyconnected with the common electrode comprises low-resistance material,e.g., molybdenum (Mo), aluminum (Al), an alloy thereof and/or anothermetal material.

As illustrated in FIG. 7, according to a particular embodiment of theinvention, touch control electrode lead wires 411 of a part of touchcontrol electrodes 401 in the array substrate of the capacitive touchcontrol screen are led out from a single side of the peripheral area 42of the array substrate to the module configured to detect the touchcontrol signal; and touch control electrode lead wires 412 of a part oftouch control electrodes 402 are led out from the display area 43 of thearray substrate to the module configured to detect the touch controlsignal. At this time, the touch control electrode lead wires 41 are thefirst metal layer or the common electrode layer. Of course, the touchcontrol electrode lead wires can also be led out from two sides of theperipheral area of the array substrate to the module configured todetect the touch control signal. The configuration where the touchcontrol electrodes are led out from two sides of the peripheral area tothe module configured to detect the touch control signal can avoid bothan overly wide single-side edge of the array substrate and theshort-circuiting problem due to overly dense wirings on the single side,as compared to the configuration where the touch control electrode leadwires are led out from the single side of the peripheral area.

The touch control electrode lead wires can alternatively be a gate metallayer or a source metal layer or a drain metal layer, the plurality oftouch control electrodes are connected to the touch control electrodelead wires through via holes in an edge area of the display area, andthe touch control electrode lead wires are led out from two sides or asingle side of the peripheral area of the array substrate to the moduleconfigured to detect the touch control signal. All the touch controlelectrode lead wires can be connected directly to an FPC or an ICoutside the display area.

As illustrated in FIG. 8, touch control electrode lead wires 413 of apart of touch control electrodes 403 in the array substrate of thecapacitive touch control screen are led out from the display area 43 ofthe array substrate to the module configured to detect the touch controlsignal. At this time, the touch control electrode lead wires 41 are thefirst metal layer or the common electrode layer. When the first metallayer is used as the touch control electrode lead wires, the touchcontrol electrode lead wires can be arranged in the non-display areabetween adjacent pixel units in the display area. That is, the touchcontrol electrode lead wires are arranged in the light shielding area ofthe black matrix of the color filter substrate, so that even though thefirst metal layer is opaque, it will not result in reducing the apertureratio of the display device.

Preferably the touch control electrodes receive a touch control scanningsignal concurrently, the touch control electrode lead wires areconnected with the module configured to detect the touch control signal,and the module configured to detect the touch control signal determinestouch control locations according to sensing signals of the touchcontrol electrodes.

FIG. 9(a) is a schematic structural diagram of touch control electrodesand touch control electrode lead wires in a color filter substrate of acapacitive touch control screen according to an embodiment of theinvention. As illustrated in FIG. 9(a), the color filter substrate ofthe capacitive touch control screen according to the particularembodiment of the invention includes a black matrix (not illustrated inthis figure) and a color filter layer in a black matrix area 92, and aperipheral area 94, wherein the color filter substrate further includesa plurality of touch control electrodes 90 and touch control electrodelead wires 91 connected with a module configured to detect a touchcontrol signal, where the touch control electrodes 90 are located in thearea 92 in which the black matrix is located, and each touch controlelectrode 90 is connected respectively with one touch control electrodelead wire 91. In this embodiment, the touch control electrode lead wires91 are led out from two sides of the peripheral area 94 onto colorfilter substrate conductive electrodes (not illustrated in this figure)preset on the color filter substrate side. FIG. 9(b) is an enlargeddiagram of a touch control electrode 90 at the area A in FIG. 9(a). Asillustrated in FIG. 9(b), the color filter layer 93 includes red colorresistors R, green color resistors G and blue color resistors B, and thetouch control electrode 90 corresponds to pixel units corresponding to aplurality of color resistors 93. Since the touch control electrode 90 isan opaque conductive layer, the touch control electrode 90 is locatedonly in the area where the black matrix is located. That is, the touchcontrol electrode 90 is structured as a grid hollowed at the locationsof the color filter layer corresponding to the red color resistors R,the green color resistors G and the blue color resistors B. Each touchcontrol electrode 90 is connected respectively with one touch controlelectrode lead wire 91, and the touch control electrode lead wires 91are also located only in the area where the black matrix is located.That is, the touch control electrode lead wires 91 are also structuredas a grid hollowed at the corresponding locations of the color filterlayer. The touch control electrodes 90 and the touch control electrodelead wires 91 are arranged overlapping with the black matrix. The widthsof the touch control electrodes 90 and the touch control electrode leadwires 91 are configured to be smaller than or equal to the width of theblack matrix to thereby avoid influencing the display transmittance dueto the arrangement of the opaque touch control electrodes 90 and touchcontrol electrode lead wires 91.

According to a particular embodiment of the invention, the color filtersubstrate of the capacitive touch control screen further includes afirst metal layer arranged on the black matrix, where the first metallayer acts as the touch control electrodes 90. When the display is aliquid crystal display in the Twisted Nematic (TN) mode, the touchcontrol electrodes 90 are configured as a common electrode, and in aparticular embodiment of the invention, the common electrode is made ofthe ITO material which is a transparent conductive layer. In thisconfiguration, the common electrode can be located at the color filterlayer instead of being located in the black matrix area 92, and thecommon electrode can simply be divided into separate zones, each ofwhich is used as one touch control electrode 90. Since a squareresistance of the ITO is higher, a metal layer can be added on the ITOto lower the resistance of the common electrode. In a particularembodiment of the invention, a second metal layer is arranged to beelectrically connected with the common electrode ITO, and as illustratedin FIG. 9(b), the second metal layer faces the black matrix area 92, andthe second metal layer is made of a low-resistance material, e.g.,molybdenum (Mo), aluminum (Al), an alloy thereof or another metalmaterial.

As illustrated in FIG. 10, according to a particular embodiment of theinvention, the touch control electrode lead wires 91 of the touchcontrol electrodes 90 in the color filter substrate of the capacitivetouch control screen are led out from the black matrix area onto colorfilter substrate conductive electrodes 101 preset on the color filtersubstrate side, where the color filter substrate conductive electrodes101 are configured to receive the touch control signal, and at thistime, the touch control electrode lead wires 91 can be the first metallayer.

As illustrated in FIG. 11, the touch control electrode lead wires 91 ofthe touch control electrodes 90 in the color filter substrate of thecapacitive touch control screen are led out from two sides of theperipheral area onto the color filter substrate conductive electrodes101 preset on the color filter substrate side. In this configuration,the touch control electrode lead wires 91 can be the first metal layer.The manner that the touch control electrode lead wires 91 are led outfrom two sides of the peripheral area onto the color filter substrateconductive electrodes 101 preset on the color filter substrate side canavoid both an overly wide single-side edge of the color filter substrateand the short-circuiting problem due to overly dense wirings on thesingle side, as compared with the manner that the touch controlelectrode lead wires 91 are led out from the single side of theperipheral area.

The above embodiment is just one example, and the touch controlelectrode lead wires can alternatively be led out from a single side ofthe peripheral area onto the color filter substrate conductiveelectrodes preset on the color filter substrate side; or a part of thetouch control electrode lead wires are led out from the black matrixarea onto the color filter substrate conductive electrodes preset on thecolor filter substrate side, and a part of the touch control electrodelead wires are led out from two sides or a single side of the peripheralarea onto the color filter substrate conductive electrodes preset on thecolor filter substrate side.

According to a particular embodiment of the invention, when the touchcontrol electrode lead wires in the color filter substrate of thecapacitive touch control screen are the common electrode layer, thetouch control electrode lead wires are led out from the black matrixarea or from two sides or a single side of the peripheral area onto thecolor filter substrate conductive electrodes preset on the color filtersubstrate side, where the color filter substrate conductive electrodesare configured to receive the touch control signal. According to aparticular embodiment of the invention, when the touch control electrodelead wires in the color filter substrate of the capacitive touch controlscreen are configured as the common electrode layer, a part of the touchcontrol electrode lead wires are led out from the black matrix area ontothe color filter substrate conductive electrodes preset on the colorfilter substrate side, and a part of the touch control electrode leadwires are led out from two sides or a single side of the peripheral areaonto the color filter substrate conductive electrodes preset on thecolor filter substrate side, where the color filter substrate conductiveelectrodes are configured to receive the touch control signal.

According to a particular embodiment of the invention, when the touchcontrol electrode lead wires in the color filter substrate of thecapacitive touch control screen are the second metal layer, the touchcontrol electrode lead wires are led out from the black matrix area orfrom two sides or a single side of the peripheral area onto the colorfilter substrate conductive electrodes preset on the color filtersubstrate side, where the color filter substrate conductive electrodesare configured to receive the touch control signal. According to aparticular embodiment of the invention, when the touch control electrodelead wires in the color filter substrate of the capacitive touch controlscreen are the second metal layer, a part of the touch control electrodelead wires are led out from the black matrix area onto the color filtersubstrate conductive electrodes preset on the color filter substrateside, and a part of the touch control electrode lead wires are led outfrom two sides or a single side of the peripheral area onto the colorfilter substrate conductive electrodes preset on the color filtersubstrate side, where the color filter substrate conductive electrodesare configured to receive the touch control signal.

Particularly the color filter substrate conductive electrodes receivethe touch control signal via a channel.

As illustrated in FIG. 12, when the channel is located on the colorfilter substrate side, the channel is implemented as a touch controlflexible circuit board 121 laminated together with the color filtersubstrate conductive electrodes 101, where the touch control flexiblecircuit board 121 is integrated with a touch control IC 122.

When the channel is located on the array substrate side, the colorfilter substrate conductive electrodes are connected with arraysubstrate conductive electrodes through conductive metal balls, and thearray substrate conductive electrodes are connected with a displayflexible circuit board, where the display flexible circuit board isintegrated with a first IC for display operations and a second IC fortouch control operations; or the color filter substrate conductiveelectrodes are connected with array substrate conductive electrodesthrough conductive metal balls, and the array substrate conductiveelectrodes are connected with a display flexible circuit board, wherethe display flexible circuit board is integrated with a third IC forboth display and touch control operations.

Preferably the touch control electrodes receive a touch control scanningsignal concurrently, and the touch control electrode lead wires and thecolor filter substrate conductive electrodes are connected with themodule configured to detect the touch control signal through channels todetect signals of the respective touch control electrodes respectively.

A particular embodiment of the invention further provides a touchcontrol display device, which includes the array substrate describedabove and/or the color filter substrate described above. A method fordriving the touch control display device includes: all the touch controlelectrodes receiving a touch control scanning signal and also receivingfeedback signals through touch the control electrode lead wiresconnected with the respective touch control electrodes in a touchcontrol phase of the display device, where the touch control electrodelead wires are connected with a module configured to detect a touchcontrol signal to detect signals of the respective touch controlelectrodes.

In the traditional display scheme, the display scan frequency is 60 Hzand the period of time of one frame is 16.67 ms. There is a scan-freeinterval of time after one frame is scanned and data signals areinputted, and a time division drive function of an integrated touchscreen can be achieved in this interval of time. In a particularembodiment of the invention, display and touch control operations can beperformed separately as per the timing of the time division drive, andas illustrated in FIG. 13, A time period per frame is divided into adisplay period of time t1 and a touch period of time t2. All of touchcontrol units drive and receive a touch control signal concurrently inthe touch period of time t2, a drive circuit inputs a multi-cycle squarewave signal to a touch control electrode n and a touch control electrodem concurrently in the touch period of time t2, and the enlarged diagramof the signal is illustrated in FIG. 14 in which each touch controlcycle includes a charging period of time T1 and a discharging period oftime T2. During charging, touch control electrode lead wires receive adrive signal and then input the drive signal to the touch controlelectrodes to charge the touch control electrodes. That is, all thetouch control electrodes receive the touch control drive signalconcurrently; and during discharging, sensing signals are outputtedthrough the touch control electrode lead wires connected with the touchcontrol electrodes, and whether there is a touch can be judged bycalculating the amount of discharge. That is, the touch controlelectrodes output the sensing signals concurrently, where the touchcontrol electrode lead wires connected with the respective touch controlelectrodes are connected with a module configured to detect a touchcontrol signal, and the module configured to detect the touch controlsignal determines touch control locations according to the sensingsignals of the touch control electrodes. Since all the touch controlelements have lead wires, changes in self-capacitance of all the touchcontrol electrodes can be detected concurrently during only one scan inthe touch control period of time to thereby shorten effectively theperiod of time for the touch control operations and also achieve theself-capacitive multi-point touch. The touch control electrodes areconnected with a specific voltage, e.g., a common electrode voltage, inthe display period of time, to thereby avoid influencing the displayeffect. Larger screens in size can be supported in the technicalsolutions according to the particular embodiments of the invention, ascompared with the conventional in-cell touch control scheme.

It is to be appreciated that there the present invention has manyimplementations and embodiments. An embodiment of the invention providesan array substrate of a capacitive touch control screen, which includes:a peripheral area and a display area; a plurality of pixel units withpixel electrodes arranged in the display area; a plurality of touchcontrol electrodes; and touch control electrode lead wires connectedwith a module configured to detect a touch control signal, wherein eachof the touch control electrodes is connected respectively with one ofthe touch control electrode lead wires.

An embodiment of the invention further provides a color filter substrateof a capacitive touch control screen, which includes a black matrix, acolor filter layer and a peripheral area, wherein the color filtersubstrate further comprises a plurality of touch control electrodes andtouch control electrode lead wires connected with a module configured todetect a touch control signal, wherein the touch control electrodes arelocated in an area of the black matrix, and each of the touch controlelectrodes is connected respectively with one of the touch controlelectrode lead wires.

An embodiment of the invention further provides a touch control displaydevice which includes the array substrate of the capacitive touchcontrol screen and/or the color filter substrate of the capacitive touchcontrol screen described above.

An embodiment of the invention further provides a method for driving thetouch control display device described above, which includes:

the touch control electrodes receiving a touch control drive signal andthe touch control electrodes outputting sensing signals in a touchcontrol phase of the display device, wherein the touch control electrodelead wires connected with the respective touch control electrodes areconnected with the module configured to detect the touch control signal,and the module configured to detect the touch control signal determinestouch control locations according to the sensing signals of the touchcontrol electrodes.

Based upon the array substrate and color filter substrate of thecapacitive touch control screen, the touch control display device andthe method for driving the touch control display device according to theinvention, the array substrate includes a plurality of touch controlelectrodes and touch control electrode lead wires connected with amodule configured to detect a touch control signal, where each of thetouch control electrodes is connected respectively with one of the touchcontrol electrode lead wires; the color filter substrate includes aplurality of touch control electrodes and touch control electrode leadwires connected with a module configured to detect a touch controlsignal, where the touch control electrodes are located in the area ofthe black matrix, and each of the touch control electrodes is connectedrespectively with one of the touch control electrode lead wires; and thetouch control display device includes the array substrate of thecapacitive touch control screen and/or the color filter substrate of thecapacitive touch control screen described above. Instead of the mannerof scanning in rows and columns, a manner that there is a separate leadwire for each touch control unit composed of each touch controlelectrode and one touch control electrode lead wire connected therewithis used, so this kind of self-capacitive design does not have theproblem of ghost points, and can achieve the multi-point touch controland also have high sensitivity in self-capacitive applications.

It is to be appreciated that there are other embodiments as well.Evidently those skilled in the art can make various modifications andvariations to the invention without departing from the spirit and scopeof the invention. Thus the invention is also intended to encompass thesemodifications and variations thereto so long as these modifications andvariations come into the scope of the claims appended to the inventionand their equivalents.

1. An array substrate of a capacitive touch control screen, comprising:a peripheral area and a display area; a plurality of pixel units withpixel electrodes positioned in the display area; a plurality of touchcontrol electrodes positioned in the display area, wherein the pluralityof touch control electrodes are arranged in M*N matrix, M being aninteger larger than or equal to 3, N being an integer larger than orequal to 3; and a plurality of touch control electrode lead wires,wherein each of the touch control electrodes is connected respectivelywith one of the touch control electrode lead wires; and, wherein each ofthe touch control electrodes and one of the touch control electrode leadwires are connected to form a touch control unit, and at least part oftouch control electrode lead wires are led out from the display area. 2.The array substrate of the capacitive touch control screen according toclaim 1, further comprising a common electrode positioned above or belowthe pixel electrodes, wherein the common electrode acts as the touchcontrol electrodes.
 3. The array substrate of the capacitive touchcontrol screen according to claim 2, further comprising a first metallayer electrically connected with the common electrode and positioned innon-display areas between the pixel units.
 4. The array substrate of thecapacitive touch control screen according to claim 3, wherein the touchcontrol electrode lead wires comprise the first metal layer or thecommon electrode, and at least part of the touch control electrode leadwires are led out from two sides or a single side of the peripheral areato a module configured to detect a touch control signal.
 5. The arraysubstrate of the capacitive touch control screen according to claim 3,wherein the touch control electrode lead wires comprise the first metallayer or the common electrode, and at least part of the touch controlelectrode lead wires are led out from the display area to a moduleconfigured to detect a touch control signal.
 6. The array substrate ofthe capacitive touch control screen according to claim 1, wherein thetouch control electrode lead wires comprise a gate metal layer or asource metal layer or a drain metal layer, the plurality of touchcontrol electrodes are connected to the touch control electrode leadwires through via holes in an edge area of the display area, and atleast part of the touch control electrode lead wires are led out fromtwo sides or a single side of the peripheral area to a module configuredto detect a touch control signal.
 7. The array substrate of thecapacitive touch control screen according to claim 1, wherein the touchcontrol electrodes receive a touch control scanning signal concurrently,and the touch control electrode lead wires are connected with a moduleconfigured to detect a touch control signal to detect signals of therespective touch control electrodes respectively.
 8. The array substrateof the capacitive touch control screen according to claim 1, wherein thetouch control electrode is a rectangle touch control electrode.
 9. Anarray substrate of a capacitive touch control screen, comprising: aperipheral area and a display area; a plurality of pixel units withpixel electrodes positioned in the display area; a plurality of touchcontrol electrodes positioned in the display area, wherein the pluralityof touch control electrodes are arranged in M*N matrix, M being aninteger larger than or equal to 3, N being an integer larger than orequal to 3; and a plurality of touch control electrode lead wires,wherein each of the touch control electrodes is connected respectivelywith at least one of the touch control electrode lead wires; and,wherein each of the touch control electrodes and the at least one of thetouch control electrode lead wires are connected to form a touch controlunit, and at least part of touch control electrode lead wires are ledout from the display area.